Controller for a seatbelt tightener

(19)

(11)

EP 0 979 761 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.10.2000 Bulletin 2000/43

(43)	Date of publication A2:
	16.02.2000 Bulletin 2000/07

(21)	Application number: 99115577.1

(22)	Date of filing: 06.08.1999

(51)	International Patent Classification (IPC)⁷: B60R 21/32, B60R 21/01, B60R 22/48

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

10.08.1998 DE 19836197

(71)	Applicant: BREED AUTOMOTIVE TECHNOLOGY, INC.
	Lakeland, FL 33807-3050 (US)

(72)	Inventor:
	Specht, Martin, Dipl.-Ing. 82340 Feldafing (DE)

(74)	Representative: Nöth, Heinz, Dipl.-Phys.
	Patentanwalt, Arnulfstrasse 25 80335 München 80335 München (DE)

(54)	Controller for a seatbelt tightener

(57) A device for putting on standby an electric igniter (3) of a tightener drive for tightening a seatbelt, in particular by retraction of the belt buckle with a first electric circuit (1) which comprises the electric igniter and is closed on buckling of the belt buckle and, furthermore, monitoring of operation is achieved in that a first test signal proportional to the electric internal resistance (R1) of the igniter (3) is scannable and with a second circuit (2) which comprises a test resistance (R2) and is closed on unbuckling the belt buckle, a second test signal proportional to the test resistance R2 being scannable.

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